Cheapest time to go

Mid April

Fly out on a Monday, return on a Wednesday, save up to $60.

The best day to depart a roundtrip ticket from Islip to London is Monday, saving up to $40. The best day to return is Wednesday, saving up to $20.

Demand is going up, Prices are flat. Book soon.

The average demand
rose
58.3%
to 171 flight searches per day compared to
108 daily searches during the previous week.
Last week's weighted average round-trip ticket price
from Islip
to London
dropped
by -1.3%
to $740 as compared to
$750 the prior week.

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Data and Methodology

This report is based on 32,187 round-trip flight prices
from crowd-sourced airfare searches made between March 12, 2018 and March 19, 2018.
We’ve included all trips that were shops less than 6 months before the departure that include a Saturday night stay.

Our data is drawn from Hopper’s combined feed of
Global Distribution System (GDS) data sources which includes about 10 million
flight price queries per day, containing about one billion individual trips per day.
Demand is represented as the number of queries not actual ticket purchases,
and is calibrated across all GDS sources for each market.
Lowest fare, or deal fare, is represented by the 10th percentile prices.
For example if the 10th percentile price is $800 dollars it means that
only 10% of trips are priced at or below this price.

Prices and popularity by date are determined by aggregating
all flights that depart before and return after the date in question.
Prices by date are 10th percentile prices of such flights.
Popularity by date factors out the overall advance purchase distribution,
as search rates naturally increase close to departure, in order to highlight long term patterns.